# Ruby vs. RubyOnRails compatibility matrix?

**URL:** <https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061>\
**Category:** Rails\
**Created:** [December 19, 2008, 10:14pm UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061 "2008-12-19T22:14:14Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![thbar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@thbar](https://www.ruby-forum.com/u/thbar)\
**Post date:** [December 19, 2008, 10:14pm UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061/1 "2008-12-19T22:14:14Z")

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Hello,

I’m looking for some compatibility matrix between specific versions of  
Ruby (like 1.8.5, 1.8.6…) and specific versions of Rails (like  
1.1.6, 1.2.2 etc).

I’m in a position where I’ll have to upgrade Ruby (to 1.8.6 or 1.8.7)  
for old Rails app (typically 1.1.6 and 1.2.2), and that kind of  
upgrade is likely to become more and more frequent.

Any hint ?

thanks!

Thibaut

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**Author:** ![thbar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@thbar](https://www.ruby-forum.com/u/thbar)\
**Post date:** [December 19, 2008, 10:22pm UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061/2 "2008-12-19T22:22:25Z")

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On Dec 19, 2008, at 4:13 PM, Thibaut Barrère wrote:

> Any hint ?
> 
> thanks!
> 
> Thibaut

Well, since I know that Rails 1.1.6 and 1.2.2 application will run  
fine under Ruby 1.8.6 (and 1.8.5), I’ll start you with that. There’s  
plenty of evidence that Ruby 1.8.7 is more of a prequel to 1.9 than an  
upgrade to 1.8.6 so you’ll have to collect your own evidence about  
older Rails running on Ruby 1.8.7.

-Rob

Rob B. [http://agileconsultingllc.com](http://agileconsultingllc.com)  
removed\_email\_address@domain.invalid

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<div class="post-metadata">

**Author:** ![thbar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@thbar](https://www.ruby-forum.com/u/thbar)\
**Post date:** [December 19, 2008, 11:38pm UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061/3 "2008-12-19T23:38:39Z")

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Hi Rob,

> Well, since I know that Rails 1.1.6 and 1.2.2 application will run  
> fine under Ruby 1.8.6 (and 1.8.5), I’ll start you with that. There’s  
> plenty of evidence that Ruby 1.8.7 is more of a prequel to 1.9 than an  
> upgrade to 1.8.6 so you’ll have to collect your own evidence about  
> older Rails running on Ruby 1.8.7.

Thanks for your feedback on 1.1.6 and 1.2.2.

I’ll start by upgrading to 1.8.6, seems like a pretty good candidate.

thanks!

– Thibaut

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<div class="post-metadata">

**Author:** ![thbar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@thbar](https://www.ruby-forum.com/u/thbar)\
**Post date:** [December 20, 2008, 12:20am UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061/4 "2008-12-20T00:20:48Z")

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avoid 1.8.7 if you’re \< rails 2.2 -

I had a number of problems (today) -

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<div class="post-metadata">

**Author:** ![thbar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/eb8c5e/32.png) [@thbar](https://www.ruby-forum.com/u/thbar)\
**Post date:** [December 20, 2008, 12:34am UTC](https://www.ruby-forum.com/t/ruby-vs-rubyonrails-compatibility-matrix/156061/5 "2008-12-20T00:34:51Z")

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Hi Jodi,

> avoid 1.8.7 if you’re \< rails 2.2 -  
> I had a number of problems (today) -

thanks for sharing this - I’m very sorry for your issues.

Maybe having some kind of community integration server to cross test the  
various builds would be useful.

Did anyone do this already ?

cheers

Thibaut Barrère